In the present investigations, the stabilities and formation energies of helium defects in the Zr/Ti2AlC interface are studied by first principles calculations.
Helium implantation can cause the formation of a helium gas-bubble superlattice in crystalline materials.
Thus, the original 12C nucleus reappears, and the four protons that have been added permit the formation of a helium nucleus.
Strong fragmentation upon ionization leads to the formation of Na+He n, K+He n, Na2+He n and K2+He n ions that contain up to at least 20 helium atoms.
The mechanism for the rupturing process is described by local defect formation by excessive irradiation of helium ions, dictated by the scanning direction of the beam.
These investigations may provide new insight into the underlying mechanisms of helium bubble nucleation and formation in the Zr/Ti2AlC interface.
Ionization of doped helium droplets by electrons involves formation of He+, followed by resonant charge transfer between helium atoms, and ending with charge transfer from He+ to the dopant [63].
This excess heat is mainly the primordial heat from the early phases of Jupiter's formation, but may result in part from the precipitation of helium into the core.
Predictions of NO formation in a series of hydrogen flames with varying levels of helium dilution are compared with experimental results.
